Earplug



FIG. 1 is a right, front-perspective view of an earplug;

FIG. 2 is a left, rear-perspective view of the earplug;

FIG. 3 is a side-view of the earplug;

FIG. 4 is a top, plan-view of the earplug; and,

FIG. 5 is a bottom, plan-view of the earplug. 

CLAIM The ornamental design for an earplug, as shown and described. 